<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!--搜索建议列表-->
		<view class="sugg-list" v-if="searchResult.length !==0">
			<view class="sugg-item" v-for="(item, i) in searchResult" 
			:key="i"
			@click="gotoDetail(item)"
			>
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!--搜索历史-->
		<view class="history-box" v-else>
			<!--标题区域-->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type='trash' size='17' @click="cleanHistory"></uni-icons>
			</view>
			<!--历史区域-->
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, i) in histories" :key='i'
				@click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				//搜索的结果列表
				searchResult:[],
				//搜索历史
				historyList:['a','app','apple']
			};
		},
		onLoad(){
			this.historyList = JSON.parse(uni.getStorageSync('kw')  || '[]');
		},
		methods:{
			input(e){
				clearTimeout(this.timer);
				this.timer = setTimeout(()=>{
					// console.log(e);
					this.kw = e;
					this.getSearchList();
					this.saveSearchHistory()
				}, 500)
			},
			async getSearchList(){
				if(this.kw.length === 0){
					this.searchResult = [];
					return;
				}
				const { data: res } = await uni.$http.post('/api/shopData.php',
				{
					getType:5,
					query:this.kw
				})
				console.log(res);
				//加载失败
				if(res.meta.status !== 200) return uni.$showMsg();
				
				this.searchResult = res.data; 
			},
			gotoDetail(item){
				console.log(item.goods_id);
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				const set = new Set(this.historyList);
				set.delete(this.kw);
				set.add(this.kw);
				// console.log(set)
				this.historyList = Array.from(set);
				//对历史数据进行持久化存储
				uni.setStorageSync('kw', JSON.stringify(this.historyList));
			},
			cleanHistory(){
				this.historyList = [];
				uni.setStorageSync('kw', '[]');
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+item
				})
			}
		},
		computed:{
			histories(){
				return [...this.historyList].reverse();
			}
		}
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top:0;
	z-index: 999;
}
.sugg-list{
	padding: 0 5px;
	.sugg-item{
		display: flex;
		align-items: center;
		justify-content: space-between;
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #555500;
		.goods-name{
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
		}
	}
}
.history-box{
	padding:0 5px;
	.history-title{
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 13px;
		border-bottom: 1px solid #fffae8;
	}
	.history-list{
		display: flex;
		flex-wrap: wrap;
		.uni-tag{
			margin-right:5px;
			margin-top:5px;
		}
	}
}
</style>
